Tubulous steam-generator.



No. 740,032. r PATBNTED SEPT. 29, 1903.

\ J. MOKEOHNIE.

TUBULOUS STEAM GENERATOR.

APPLICATION FILED DEC. 24. 1901.

N0 MODEL. 3 BHEETS-SHEET 1.

WITNESSES. //VV NTO H0 MOD J. MoKEOHNIEQ PATENTED SEPT. 29. 1903.

TUBULOUS STEAM GENERATOR.

APPLICATION FILEf) DBO. 24. 1901.

NESSES 3 SHEETSSHEET 2.

//v VENTUR m: mums Fzrzns co. PNOYO-LITHQ, wAsmyuTo n. c.

ilo. 740,03.

UNITED STATES i iatented September 29,1903

PATENT OFFICE.

JAMES MOKECHNIE, OF BARROW-IN-FURNESS, ENGLAND, ASSIGN OR VICKERS SONS &MAXIM, LIMITED, OF SHEFFIELD AND LONDON,

ENGLAND.

SPECI CA ION forming part of Letters Patent N 0. 740,032, datedSeptember 29, 1903. Application filed December 24,1901. Serial No.87,101. (No modeli) To all whom it may concern.-

Be it knownthat I, JAMES MOKECHNIE, a

subject of His Majesty the King of Great Britaimresiding atBarrow-in-Furness, in the county of Lancaster, England, have invented acertain new and useful Improvement in Tubulous Steam-Generators, ofwhich the fol lowing is a specification.

This invention relates to the class of tubulous steamgenerators 'havinga number of vertical or inclined water tubes or headers divided by apartition and connected to a steam and water drum, to which headers areconnected at approximately right angles'a number of steam-generating andwater-circulating elements arranged over the furnace, each elementconsisting of an outer tube closed at one end and open at the other toone side of the header and of an inner tube open at one end to the outertube and atthe other to the other side of the header, the object of myinvention being to improve certain details in the arrangement andconstruction of the headers whereby tained.

In the accompanying drawings, Figure l is a sectional elevation of apart of a generator, showing my improvement. Fig. 2 is a side elevation,partly in section, of the improved construction and arrangement of apair of headers. Fig. '3 is a front elevation of such a pair of headers.Fig. 4 isa plan showing the arrangement of the headers in pairs. Fig. 5is a sectional plan, on a still larger scale, ofa header and an elementcarried thereby.

-The generator comprises the usual water and steam drum 1, headers 2,and elements-or double tubes 3 connected thereto, as seen in Fig. 1.

For the purpose of economizing space I form the headers as follows: Eachconsists of a tube, the original outside diameter of which is indicatedby the dotted line 4 in Fig. 5, which is subsequently reduced to bringits exteriorform to an oval shape, as shown in such greater efficiencyis ob- .figure and also in dotted line, Fig. 4. This gives a thin sideand thickened end portions, in which are secured, respectively, theouter tube or steam-generating element 5 and the hand-hole caps 6, theconstruction of which does not'form part of the present invention; Eachtwo headers 2, forming a pair, are secured in or provided with a flangedhead 7,

"and for the purpose of holding same therein they are preferably againreduced in diame= ter to the form of a cylindrical tube, the wall tionof the headers with the drum 1 is re-- duced'and more can be placed inthe same space than if each had a separate flange connection, two rowsbeing easily obtained in place of one, as isusual in this type ofgenerator.

The inner tubeor water-circulating element 9 is carried in the header bya partition 10, consisting of a straight plate or plates continuous fromone end of the header to the other and held in'grooved lugs 11 11,having screw-threaded portions 12-, by which they can be screwed intothe walls of the header-2 from the outside, theplate 10 passing freelyinto the grooves of' such'lugs, so that it can be dropped into positionin the header and also beeasily withdrawn without afiecting the latter.

.The plate 10 is preferably carried up into the drum 1 and provided witha curved portion 10, which will serve to direct and assist thecirculation of water and steam out of the rear compartment of the headerand the elements 5, and another curved collecting-plate 14 may becarried inside such drum to direct and assist the circulation into thefront compartment and the element 9, if desired.

The tubes9 are preferably provided with bell-mouthed attachments 13; butthis and their manner of connection to the plate 10 do not form part ofthe present invention.

The construction of the outer tube 5 and the means of supporting thetube 9 therein form the subject of a separate divisional applicationhereof.

For the purpose of supporting the free ends of the elements 5 in such amanner that they may freely expand and contract I provide asupporting-framework consisting of a number of vertical or approximatelyvertical bars 15 in pairs, each pair being connected by a rivet inside atubular ferrule 0r sleeve 17, forming a ladder shaped structure on therungs of which each tube rests.

The group or nest of circulating and generating tubes or elements may bedivided into a number of combustion-chambers by portable baffle-plates21.

What I claim is- 1. In a tubulous steam-generator of the classdescribed, the combination with a steam and water drum of headersarranged in pairs one of each pair being behind the axial line of theother and means for carrying such headers in pairs.

2. In a tubulous steam -generator of the class described the combinationwith a steam and water drum of a series of flanged heads and a pair ofheaders carried by each of such flanged heads one of each pair beingbehind the axial line of the other.

3. In a tubulous steam-generator of the class described, the combinationwith a steam and water drum of a pair of headers each of oval exteriorsection and circular interior section, arranged in pairs, one of eachpair being behind the axial line of the other and a flanged head inwhich each pair of headers is carried.

4. In a tubulous steam -generator of the class described, and incombination, aheader, a series of grooved lugs projecting through thewalls into the interior of name, means for introducing such lugs fromthe outside of the header and holding them in the walls and a continuouspartition-plate held in the grooves of such lugs.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JAMES MC KECHNIE.

Witnesses:

R. S. D. BRADSHA\V, WM. GORDON.

